DataVXACS Applied Materials & InterfacesPaper
journal article·2019-08-28

MgH2/CuxO Hydrogen Storage Composite with Defect-Rich Surfaces for Carbon Dioxide Hydrogenation

Haipeng Chen, Pei Liu, Jiaqi Li, Yuanjie Wang, Chenxing She, Jinqiang Liu, Linbao Zhang, Qingfeng Yang, Shixue Zhou, Xun Feng

ACS Applied Materials & Interfaces· Volume 11· Issue 34
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Source abstract

Abstract

Thermal conversion of CO2 to value-added chemicals is challenging due to the extreme inertness of the CO2 molecule and the low selectivity of products. We reported a defect-rich MgH2/CuxO hydrogen storage composite from mechanochemical ball-milling for the catalytic hydrogenation of CO2 to lower olefins. The defect-rich MgH2/CuxO hydrogen storage composite achieves a C2=–C4= selectivity of 54.8% and a CO2 conversion of 20.7% at 350 °C under a low H2/CO2 ratio of 1:5, which increases the efficiency of H2 utilization by offering lattice H– species for hydrogenation. Density functional theory calculations show that the defective structure of MgH2/CuxO can promote CO2 molecule adsorption and activation, while the electronic structure of MgH2 is beneficial for offering lattice H– for CO2 molecule hydrogenation. The lattice H– can combine the C site of CO2 molecule to promote the formation of Mg formate, which can be further hydrogenated to lower olefins under a low H– concentration. This work for CO2 conversion by a defect-rich MgH2/CuxO hydrogen storage composite can inspire the catalysts design for the hydrogenation of CO2 to lower olefins.
Source: openalex_inverted_index · Quality: baseline

Research context

CompositesCatalysis & surfaces

OpenAlex topics: Hydrogen Storage and Materials · Catalysts for Methane Reforming · Spacecraft and Cryogenic Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Henan Key Laboratory of Function-Oriented Porous Materials, Luoyang Normal University, Luoyang 471934, China

State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China

State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China

State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China

Funding

National Natural Science Foundation of China · Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering · Shenzhen Supercomputer Center · Foundation for Science & Technology Innovation Talents in Henan province · SDUST Research Fund · Scientific & Technological Project of Henan province

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